JPH03505701A - metal honeycomb body - Google Patents
metal honeycomb bodyInfo
- Publication number
- JPH03505701A JPH03505701A JP2502010A JP50201090A JPH03505701A JP H03505701 A JPH03505701 A JP H03505701A JP 2502010 A JP2502010 A JP 2502010A JP 50201090 A JP50201090 A JP 50201090A JP H03505701 A JPH03505701 A JP H03505701A
- Authority
- JP
- Japan
- Prior art keywords
- microstructure
- honeycomb body
- flow direction
- flow
- honeycomb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002184 metal Substances 0.000 title claims description 7
- 239000003054 catalyst Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
- F01N3/2821—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/32—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils
- F01N2330/321—Honeycomb supports characterised by their structural details characterised by the shape, form or number of corrugations of plates, sheets or foils with two or more different kinds of corrugations in the same substrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/1234—Honeycomb, or with grain orientation or elongated elements in defined angular relationship in respective components [e.g., parallel, inter- secting, etc.]
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。 (57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 金属製ハニカム体、特に流れを混合するミクロ構造を有する触媒担体この発明は 、特に自動車の触媒担体として使用するための金属製ハニカム体に関する。従来 の技術から金属製ハニカム体の種々の形状が知られており、その際この種のハニ カム体を形成する個々の板の形状付与に関しては機械的安定性の観点及び個々の 流路の形状が重視される。更に加工技術上の問題及び有効表面の増大の観点がこ れに加わる。この種のハニカム体は例えば欧州特許出願公開第0159468号 、同第0220468号、同第0245737号及び同第0254738号公報 に記載されている。[Detailed description of the invention] This invention is based on a metal honeycomb body, especially a catalyst carrier with a flow-mixing microstructure. In particular, it relates to a metal honeycomb body for use as a catalyst carrier in automobiles. Conventional Various shapes of metal honeycomb bodies are known from the technology of Regarding the shaping of the individual plates forming the cam body, consideration should be given to mechanical stability and individual The shape of the flow path is important. Furthermore, processing technology issues and the viewpoint of increasing the effective surface area are join in. This type of honeycomb body is disclosed in, for example, European Patent Application Publication No. 0159468. , No. 0220468, No. 0245737, and No. 0254738 It is described in.
例えば個々の流路の間の結合孔により、又は相互に斜めに波打ち上下に重なり合 った二つの板層の使用により、ハニカム体中の流れの巨視的混合に影響を与える ような種々のマクロ構造も既に提案されている。For example, by connecting holes between individual channels or by corrugating each other diagonally and overlapping one another. The use of two plate layers to influence the macroscopic mixing of the flow in the honeycomb body. Various macro structures have already been proposed.
また欧州特許第0136515号明細書では、平板と波板の交互の層から螺旋形 に巻かれたハニカム体において、平板に流れ方向に対しほぼ直角なミクロ構造を 設けることが既に提案されている。本来はこの種のハニカム体の加工及びろう付 けを有利にするために開発されたこのような従来技術をこの発明は出発点として いる。すなわち流れに対するミクロ構造の作用効果の研究により、個々の流路中 の流れの微視的混合を助成する補助的な効果が現れることが判明した。Further, in the specification of European Patent No. 0136515, a spiral shape is formed from alternating layers of flat plates and corrugated plates. In a honeycomb body wrapped in It has already been proposed to have one. Originally, processing and brazing of this type of honeycomb body This invention takes as a starting point the conventional technology that was developed in order to There is. In other words, by studying the effect of microstructure on flow, It was found that an auxiliary effect appears that promotes microscopic mixing of the flow.
この種の効果は、螺旋形に巻き付けられたハニカム体の平板と波板の間の形状結 合が記載されている欧州特許出願公開第0298943号公報でも言及されてい る。This type of effect is caused by the geometrical relationship between the flat and corrugated sheets of a spirally wound honeycomb. It is also mentioned in European Patent Application Publication No. 0298943, which describes the Ru.
しかしながらこの効果の系統立った利用は行われていない。However, this effect has not been systematically exploited.
従ってこの発明の課題は、ハニカム体の個々の流路中の微視的混合に対するミク ロ構造の作用を特に有利な方法で利用し、それにより触媒作用の効果を高めるこ とのできる金属製ハニカム体を提供することにある。同時にハニカム体の機械的 特性に有利に影響を与えようとするものである。Therefore, the problem of this invention is to control the microscopic mixing in the individual channels of the honeycomb body. The effect of the catalytic structure can be exploited in a particularly advantageous way, thereby increasing the effectiveness of the catalytic action. An object of the present invention is to provide a metal honeycomb body that can be At the same time, the mechanical structure of the honeycomb body It seeks to favorably influence the characteristics.
この課題の解決のためにこの発明によれば、ハニカム形状、平均の流路幅及び主 な機械的特性を決定する少なくとも一つの第1のマクロ構造を少なくとも部方的 に備える板から成る金属製ハニカム体が用いられ、その際ハニカム体は流れ方向 へ流体を貫流可能な平均流路幅を備える複数の流路な有し、少なくとも板の一部 が少なくとも部分域に補助的なミクロ構造を備え、このミクロ構造が平均流路幅 の0601〜約0.3倍で少なくとも15μmの高さを有し、その際ミクロ構造 が流れ方向に対し直角に又は角度を成して延び、かつ流れ方向に1〜10mmの 間隔を置いて連続して並ぶようにされる。このような形状は下記の知見に基づい ている。すなわち触媒のためのハニカム体は、単位断面積出たり多数の(通常平 方インチ当たり200〜500個の)流路に基づき、ハニカム体の全体積に関し て大きい内部表面を有する。有効な触媒作用のために特にできる限り大きい触媒 表面積が必要である。有効表面積はアルミナから成る層を被覆することにより通 常3桁以上増すことができる。その理由はμm領域の粗い割れ目の多い結晶質の 表面構造にある。しかしながら有効な触媒作用による変換のためには、壁に近い 流れ領域と中心流との活発な交換もまた重要である(第7図参照)。ハニカム体 の流路中の乱流ではあるがしかし特に層流どして図示された流れ分布曲線は、移 行域において壁に向かって著しく低下する速度を有する。ガス流速が全体として 高められると確かに壁近傍での交換は良好となるが、しかしハニカム体中での高 い絞り損失及び触媒活性領域でのガスの短い滞留時間という犠牲を払わなければ ならない。アルミナ自体の粗い表面は10um領域の均一な粗さのゆえに特に横 方向の混合をもたらさない。しかしながらこの発明によれば、アルミナの表面粗 さより明らかに太き(しかじ流路幅より明らかに小さい個々の板の密に連続する 補助的ミクロ構造が、すべての流路特に壁近傍の微視的な流れ状況の著しい改善 を可能にする。それにより流れ損失がほとんど上昇しないにもかかわらず、流路 壁の多数の微視的隆起が局部的なガス流速上昇をもたらし、また凹所がガス流速 の局部的な減速をもたらす。In order to solve this problem, according to the present invention, the honeycomb shape, the average channel width and the main at least partially at least one first macrostructure that determines mechanical properties. A metal honeycomb body consisting of plates is used, with the honeycomb body being oriented in the flow direction. At least a portion of the plate has a plurality of channels with an average channel width that allows fluid to flow through the plate. has an auxiliary microstructure in at least a partial region, and this microstructure has an average channel width. 0601 to about 0.3 times the height of at least 15 μm, in which case the microstructure extends perpendicularly or at an angle to the flow direction, and extends from 1 to 10 mm in the flow direction. They are lined up consecutively at intervals. This shape is based on the following knowledge ing. In other words, the honeycomb body for the catalyst may have a unit cross section or a large number of (usually flat) (200 to 500 channels per square inch) for the total volume of the honeycomb body. and has a large internal surface. Catalyst as large as possible especially for effective catalysis Surface area is required. The effective surface area can be increased by coating with a layer of alumina. It can always be increased by more than 3 digits. The reason is that the crystalline material has many coarse cracks in the μm region. It is in the surface structure. However, for effective catalytic conversion, close to the wall Active exchange between the flow field and the central flow is also important (see Figure 7). honeycomb body The flow distribution curve illustrated for turbulent but especially laminar flow in the flow path of It has a velocity that decreases significantly towards the wall in the running area. The gas flow rate as a whole If the height is increased, the exchange near the wall will certainly be better, but if the height is increased in the honeycomb body, without sacrificing low throttling losses and short residence time of the gas in the catalytically active region. No. The rough surface of alumina itself is particularly rough due to its uniform roughness in the 10um region. Does not result in directional mixing. However, according to this invention, the surface roughness of alumina It is clearly thicker than the width of the channel (a dense continuation of individual plates that are clearly smaller than the channel width). The auxiliary microstructure significantly improves the microscopic flow conditions in all channels, especially near the walls. enable. Even though it causes little increase in flow losses, Numerous microscopic ridges on the wall lead to localized increases in gas flow velocity, and depressions increase gas flow velocity. resulting in local deceleration.
この発明の有利な実施態様は請求の範囲の従属環に記載されている。平板と波板 の交互の層から成るハニカム体の場合には波板が流路壁の大部分を形成するので 、波板にミクロ構造を設けるのが特に有利である。この種のミクロ構造を備える 板の波形加工が問題無く可能であり、しかも波形及びミクロ構造を場合により一 つの工程で作ることができるということが判明した。すべての流路壁の少なくと も部分域に連続するミクロ構造を備えるのが一般に有効である。Advantageous embodiments of the invention are specified in the dependent claims. flat plate and corrugated plate In the case of a honeycomb body consisting of alternating layers, the corrugated plates form most of the channel walls. It is particularly advantageous to provide the corrugated sheet with a microstructure. with this kind of microstructure It is possible to process the corrugation of the board without any problems, and the corrugation and microstructure can be uniformly processed depending on the case. It turns out that it can be made in just one process. At least all channel walls It is generally advantageous to provide continuous microstructures in subareas.
前記の点に関してはミクロ構造の正確な形状は特に重要ではない。ミクロ構造は 、流れ方向に対し直角に又は角度を成して延び片側又は両側に向かって板表面か ら突出する凹み、筋、節、溝などから成ることができる。もちろんすべての流路 に均一な影響を与えるために、板の両側に向かう構造が有効である。もちろんミ クロ構造は個々の板にわたり中断せずに延びる必要は無く、中断して又は相互に ずれて延びることができる。The exact shape of the microstructure is not particularly important in this respect. The microstructure is , extending perpendicularly or at an angle to the direction of flow and extending toward one or both sides of the plate surface. It can consist of depressions, striations, knots, grooves, etc. that protrude from the surface. Of course all channels In order to have a uniform influence on the structure, it is effective to have a structure facing both sides of the plate. Of course Mi The black structure need not extend uninterrupted across the individual plates, but may be interrupted or connected to each other. It can extend out of alignment.
中心流に向かう方向への周縁流の成分にとっては、ミクロ構造が流れ方向に対し 正確に直角に置かれることは必ずしも重要ではない。従ってミクロ構造は例えば 流れ方向に対し75″′〜1.05°の角度αを成すことができる。For the peripheral flow component in the direction toward the central flow, the microstructure is Exactly perpendicular placement is not necessarily important. Therefore, the microstructure is e.g. An angle α of between 75″ and 1.05° can be made with respect to the flow direction.
中心流の方向への周縁流の成分を発生させるばかりでな(、全体としてすべての 個々の流路中に旋回をもたらそうとするときには、ミクロ構造は流れ方向に対し 士(15°〜75″′)、望ましくは約45”の角度を成すことができる。この 種の形状の場合に中心流の方向への周縁流の成分ばかりでなく全体として周縁流 の旋回が生じ、両者は共に改善された混合を結果としてもたらす。Not only does it generate a peripheral flow component in the direction of the central flow (but all When trying to create swirl in individual channels, the microstructure is (15° to 75″), preferably about 45″. this In the case of a seed shape, not only the peripheral flow component in the direction of the central flow but also the peripheral flow as a whole swirling occurs, both of which result in improved mixing.
特に有効な旋回をすべての流路中で発生させるために、上下に重なる二つの板層 に流れ方向に対し等しい角度のしかし逆の正負符号の角度のミクロ構造を設ける ことが有効である。この場合には一つの流路を形成する板の両ミクロ構造がほぼ 螺旋形のミクロ構造となるように補い合うので、旋回が特に促進される。In order to generate a particularly effective swirl in all channels, two plate layers are placed one above the other. to provide microstructures with angles of equal but opposite sign to the flow direction. This is effective. In this case, both microstructures of the plates forming one channel are approximately Since they complement each other in a helical microstructure, swirling is particularly promoted.
0.05〜8mm、特に約0.5〜3mmの流れ方向の寸法がミクロ構造にとっ て有利であることが判明した。ミクロ構造の高さに対してはハニカム体の流路の 大きさが重要である。ミクロ構造の高さに対しては流路の平均幅の望ましくは約 0.05〜0.1倍が有利であることが判明している。流れ方向におけるミクロ 構造の相互間隔は1〜10mm、望ましくは2〜8mm、特に4〜6mmとする ことができる。A machine direction dimension of 0.05 to 8 mm, especially about 0.5 to 3 mm, is suitable for the microstructure. It turned out to be advantageous. The height of the honeycomb structure is dependent on the height of the microstructure. Size matters. For the height of the microstructure, the average width of the channels is preferably approximately A factor of 0.05 to 0.1 has proven advantageous. Micro in flow direction The mutual spacing of the structures is between 1 and 10 mm, preferably between 2 and 8 mm, especially between 4 and 6 mm. be able to.
板の積層又は巻き付けの際に、予め予期できたように、ミクロ構造は必ずしも妨 げとはならずそれどころか補助的な機械的効果を発揮できるので有利である。As expected, the microstructure does not necessarily interfere with the lamination or wrapping of plates. This is advantageous because it does not act as a bulge, but rather provides an auxiliary mechanical effect.
板上のミクロ構造の形状、間隔及び配置の調和により巻き付け、積層又はより合 わせの際に板の接触範囲でのこれらの構造の形状的相互係合を可能にすることが でき、それにより接触範囲の事後のろう付けが問題なく可能となるばかりでなく 、ハニカム体全体の補助的な機械的強度をも達成することができる。部分的には ミクロ構造はまた板の線膨張を補償することもできる。By harmonizing the shape, spacing and arrangement of the microstructures on the plate, it is possible to wrap, stack or twist them. It is possible to enable a geometrical interengagement of these structures in the contact area of the plates during assembly. , which not only makes it possible to subsequently braze the contact area without any problems, but also , supplementary mechanical strength of the entire honeycomb body can also be achieved. partially The microstructure can also compensate for linear expansion of the plate.
ミクロ構造の形成は種々の方法で可能である。例λばこの形成は成形された鋼ロ ーラとゴムローラとの間で、又は相応に成形され場合によりかみ合う二つの鋼ロ ーラの間で行うことができる。断続的処理による構造の型押しもまた可能である 。ミクロ構造は一般に板の塑性変形性がその加工にとって十分であればあるほど 小さくなる。Formation of the microstructure is possible in various ways. For example, the formation of a cigarette is made of formed steel. between the roller and the rubber roller, or between two correspondingly shaped and optionally interlocking steel rollers. It can be done between Embossing of structures by intermittent processing is also possible . The microstructure is generally the better the plastic deformability of the plate is sufficient for its processing. becomes smaller.
この発明の実施例が図面に概略的に示されており、その際第1図はミクロ構造を 備える帯板を、第2図はミクロ構造の一実施例を備λるこの種の帯板の断面を、 第3図は別のミクロ構造を示すための第1図による断面を、第4図は流れ方向に 対し角度を成すミクロ構造を備えた帯板を、第5図は旋回発生に適したミクロ構 造を備える帯板を、第6図はこの発明に基づくミクロ構造を備えほぼ巻き付は完 了したハニカム体を、第7図は個々の流路中の流れの状態を示す。An embodiment of the invention is schematically illustrated in the drawings, in which FIG. 1 shows a microstructure. FIG. 2 shows a cross-section of such a strip with an embodiment of the microstructure. Figure 3 is a cross-section according to Figure 1 to show another microstructure, and Figure 4 is in the flow direction. Figure 5 shows a strip plate with a microstructure that forms an angle to the FIG. 6 shows a strip plate having a micro structure based on the present invention and almost completely wrapped. FIG. 7 shows the flow conditions in the individual channels of the completed honeycomb body.
第1図は、帯板2又は3の一部を示し、この帯板はその長手方向にすなわち後の 貫流方向に対し直角に延びるミクロ構造5を有する。FIG. 1 shows a part of a strip 2 or 3, which strip extends in its longitudinal direction, i.e. It has a microstructure 5 extending at right angles to the flow direction.
第2図は、第1図に示す切断線II/III−II/IIIによる断面を示し、 しかもこの発明に基づくミクロ構造5の複数の変形例のうちの一つを示す。帯板 2又は3はほぼ平行に延びる複数の溝6.7を有し、これらの溝の間隔aは相互 に1〜10mm、例えば約2mmとすることができる。ミクロ構造の個々の山6 又は谷7の流れ方向における寸法は例えば約0.1〜0.5mmとすることがで きる。FIG. 2 shows a cross section taken along cutting line II/III-II/III shown in FIG. 1, Furthermore, one of a plurality of modified examples of the microstructure 5 based on the present invention is shown. strip 2 or 3 has a plurality of grooves 6.7 extending approximately in parallel, and the distance a between these grooves is 1 to 10 mm, for example about 2 mm. Individual peaks of microstructure 6 Alternatively, the dimension of the valley 7 in the flow direction can be, for example, about 0.1 to 0.5 mm. Wear.
帯板2又は3の表面に関するミクロ構造の最大高さは、ハニカム体中の流路の平 均幅の分数、例えば約0.05倍とすべきである。絶対値としてミクロ構造は例 えば15〜100μmの高さとすることができる。The maximum height of the microstructure with respect to the surface of the strips 2 or 3 is determined by the flatness of the channels in the honeycomb body. It should be a fraction of the uniform width, for example about 0.05 times. Microstructure as an absolute value is an example For example, the height can be 15 to 100 μm.
第3図は、ミクロ構造の別の実施例を示し、この実施例では個々の隆起8及び凹 所9がほぼ型押しされた溝又は凹みの形を有する。FIG. 3 shows another embodiment of the microstructure, in which individual ridges 8 and depressions The area 9 has a substantially embossed groove or depression shape.
第4図は、帯板2又は3上のミクロ構造5が後の貫流方向Sに対し角度αを成す ことができることを示す。効果の大きい横方向の混合のために、ミクロ構造は流 れ方向に対し直角とする必要は無く、直角方向から約15°そらずことができ第 5図は、特別な目的に対しては後の貫流方向Sに関して帯板2又は3上のミクロ 構造5の間の更に小さい角度を考慮することもできることを概略的に示す。FIG. 4 shows that the microstructures 5 on the strips 2 or 3 form an angle α with respect to the subsequent flow direction S. Show what you can do. For highly effective lateral mixing, the microstructure It is not necessary to make it perpendicular to the direction of rotation, but it can be deviated from the perpendicular direction by about 15 FIG. 5 shows that for special purposes, the microstructure on the strip 2 or 3 with respect to the subsequent flow direction S is It is shown schematically that even smaller angles between structures 5 can also be considered.
すべての個々の流路中で旋回を発生させるために角度αを例えば約45°とする ことができ、その際この角度範囲は流路の寸法及び流路中の流速に関係して±( 15°〜75e)とすることができる。The angle α is, for example, approximately 45° in order to generate a swirl in all individual channels. The angular range can then be ±( depending on the dimensions of the flow channel and the flow velocity in the flow channel). 15° to 75e).
第6図は、完成直前の状態におけるハニカム体lを示す。ハニカム体1は貫流方 向Sに対し直角に延びるミクロ構造5を有する巨視的に平らな帯板2と、貫流方 向Sに対し直角なミクロ構造5を補助的に有する巨視的に波打った帯板3とから 成る。個々の流路4の平均幅すが示されている。第1のマクロ構造が例えばイン ボリュート歯形により作られた波形である限り、一般に平均の流路幅すは第1の ミクロ構造の平均波高とほぼ同じ大きさを有する。従って第2のマクロ構造の大 きさも波高に関連づけることができる。特に波高も平均流路幅もハニカム体全体 に対して正確に定義できないようなマクロ構造が存在する。この発明を同様に適 用可能なこの種の場合に対しては、平均流路幅を同様に成形された二つの板眉間 の平均間隔と理解すべきである。これは簡単な構造の場合には支配的な波高に相 応する。螺旋形に巻き付けられた触媒担体はこの発明を適用可能な複数の可能性 のうちの1例にすぎない。従来の技術で知られているのと同様にミクロ構造は、 積層した又はより合わせた帯板から成るハニカム体の改良に適している。FIG. 6 shows the honeycomb body l in a state just before completion. Honeycomb body 1 is in the through-flow direction A macroscopically flat strip 2 with a microstructure 5 extending at right angles to the direction S and a through-flow direction from a macroscopically corrugated strip 3 having an auxiliary microstructure 5 perpendicular to the direction S; Become. The average width of the individual channels 4 is shown. If the first macro structure is As long as the waveform is created by the volute tooth profile, the average channel width is generally the first It has approximately the same size as the average wave height of the microstructure. Therefore, the size of the second macro structure Wave height can also be related to wave height. In particular, the wave height and average channel width are the same throughout the honeycomb body. There are macro structures that cannot be precisely defined. This invention can be applied similarly. For this type of case, where the average channel width is should be understood as the average interval of In the case of a simple structure, this is compatible with the dominant wave height. respond. Helically wound catalyst carriers provide multiple possibilities for applying this invention. This is just one example. The microstructure as known in the prior art is Suitable for improving honeycomb bodies consisting of laminated or twisted strips.
第7図は、ハニカム体の個々の流路4中の流速分布を示す。流路の周縁領域では 流れは比較的緩やかであり、層流の場合に流路中央の中心流に対する交換はほと んど行われない。比較のためにミクロ構造を備えずに流路4を部分的に画成する 板3は、この流速分布に影響を与えない。しかしながらミクロ構造5を備える板 2は、流路4中の圧力損失を過度に高めることなく、まさに触媒的に有効な周縁 領域に流れの混合をもたらす。FIG. 7 shows the flow velocity distribution in the individual channels 4 of the honeycomb body. In the peripheral area of the channel The flow is relatively slow, and in the case of laminar flow, there is almost no exchange with respect to the central flow in the center of the channel. It's never done. Channel 4 is partially defined without a microstructure for comparison. Plate 3 does not affect this flow velocity distribution. However, the plate with the microstructure 5 2 is precisely the catalytically effective peripheral edge without excessively increasing the pressure drop in the channel 4. Brings flow mixing into the area.
この発明は個々の流路中の流れの微視的旋回により排気ガス触媒中で触媒作用に よる変換を高めるので、その他の著しい欠点無しに例えば自動車の排気ガス触媒 は数%高い変換率を有することができる。The invention achieves catalytic action in the exhaust gas catalyst by microscopic swirling of the flow in the individual channels. for example in automobile exhaust gas catalysts without any other significant disadvantages. can have conversion rates that are several percent higher.
II/III IG 3 国際調査報告 国際調査報告II/III IG 3 international search report international search report
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE8900467U DE8900467U1 (en) | 1989-01-17 | 1989-01-17 | Metallic honeycomb body, preferably catalyst carrier body with microstructures for flow mixing |
DE8900467.1 | 1989-01-17 | ||
PCT/EP1990/000086 WO1990008249A1 (en) | 1989-01-17 | 1990-01-16 | Metallic honeycomb structure, preferably catalyst support with microstructures for flow mixing |
Publications (2)
Publication Number | Publication Date |
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JPH03505701A true JPH03505701A (en) | 1991-12-12 |
JPH0622683B2 JPH0622683B2 (en) | 1994-03-30 |
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Application Number | Title | Priority Date | Filing Date |
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JP2502010A Expired - Lifetime JPH0622683B2 (en) | 1989-01-17 | 1990-01-16 | Metal honeycomb body |
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US (1) | US5157010A (en) |
EP (1) | EP0454712B1 (en) |
JP (1) | JPH0622683B2 (en) |
KR (1) | KR0140873B1 (en) |
BR (1) | BR9007034A (en) |
DE (2) | DE8900467U1 (en) |
RU (1) | RU2053017C1 (en) |
WO (1) | WO1990008249A1 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2733640C3 (en) * | 1977-07-26 | 1981-04-30 | Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart | Matrix for a catalytic reactor for exhaust gas cleaning in internal combustion engines |
DE2902779C2 (en) * | 1979-01-25 | 1985-09-26 | Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co. KG, 7000 Stuttgart | Matrix for a catalytic reactor for exhaust gas cleaning in internal combustion engines |
JPS5932183A (en) * | 1982-08-17 | 1984-02-21 | Omron Tateisi Electronics Co | Piezoelectric bimorph |
DE3331969A1 (en) * | 1983-09-05 | 1985-04-25 | INTERATOM GmbH, 5060 Bergisch Gladbach | METAL CARRIER HOUSING FOR EXHAUST GAS CATALYSTS WITH ADDITIONAL GROOVES |
ES2032472T5 (en) * | 1987-01-19 | 1995-08-16 | Emitec Emissionstechnologie | METALLIC CATALYST SUPPORT BODY OF TWO DIFFERENT CORRUGATED SHEET PLATES. |
SE461018B (en) * | 1987-07-06 | 1989-12-18 | Svenska Emmisionsteknik Ab | KATALYSATORBAERARE |
-
1989
- 1989-01-17 DE DE8900467U patent/DE8900467U1/en not_active Expired - Lifetime
-
1990
- 1990-01-16 WO PCT/EP1990/000086 patent/WO1990008249A1/en active IP Right Grant
- 1990-01-16 BR BR909007034A patent/BR9007034A/en not_active IP Right Cessation
- 1990-01-16 RU SU905001129A patent/RU2053017C1/en not_active IP Right Cessation
- 1990-01-16 KR KR1019900702056A patent/KR0140873B1/en not_active IP Right Cessation
- 1990-01-16 EP EP90901792A patent/EP0454712B1/en not_active Expired - Lifetime
- 1990-01-16 JP JP2502010A patent/JPH0622683B2/en not_active Expired - Lifetime
- 1990-01-16 DE DE9090901792T patent/DE59000277D1/en not_active Expired - Lifetime
-
1991
- 1991-07-17 US US07/731,523 patent/US5157010A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003520133A (en) * | 2000-01-17 | 2003-07-02 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Catalyst support with microstructured expandable sleeve |
JP4809563B2 (en) * | 2000-01-17 | 2011-11-09 | エミテック ゲゼルシヤフト フユア エミツシオンス テクノロギー ミツト ベシユレンクテル ハフツング | Catalyst support with microstructured expandable sleeve |
KR20230043995A (en) | 2020-08-04 | 2023-03-31 | 미츠비시 파워 가부시키가이샤 | Denitration catalyst and exhaust gas purification method |
Also Published As
Publication number | Publication date |
---|---|
DE59000277D1 (en) | 1992-10-01 |
DE8900467U1 (en) | 1990-05-17 |
BR9007034A (en) | 1991-10-08 |
EP0454712A1 (en) | 1991-11-06 |
KR0140873B1 (en) | 1998-07-01 |
US5157010A (en) | 1992-10-20 |
EP0454712B1 (en) | 1992-08-26 |
WO1990008249A1 (en) | 1990-07-26 |
RU2053017C1 (en) | 1996-01-27 |
JPH0622683B2 (en) | 1994-03-30 |
KR910700395A (en) | 1991-03-15 |
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